Positive and negative polarity?

R

Rubbery

New Member
How can you tell the difference between the two? I have 2 laptops and they both use the same charger.

I got a car charger from a mate and hooked it up to one of the laptops and now it will not charge at all. :eek:

I didnt realise that the tip on the end had a 'positive' polarity and 'negative' polarity setting. :doh:

What symbol should I look for to determine the different polarities and is the laptop buggered from the possible wrong polarity?

Thank you please. :)
 
"+" = Positive.
"-" = Negative.
If there are no symbols, then red is positive and black is negative, if colors are used.
Tom
 
I have done an extensive search and found what I was needing to know, but the unit will still not charge. Is this a knackered battery?
 
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